Improvement in machines for cutting blanks for pipe-elbows



0.11. AMANNS. L. A. HARKER. MACHINES FOR CUTTING BLANKS FOR PIPE-ELBOWS.

No. 194,066. "Patented. Aug.14,1877.

WITNESSES lNVENTORS' g lf war/aha, v Z7 MfiORNEY ".PBERS.PHDTO-UTHDGRAPHER. WA EHINGTONv D C.

UNITED STATES PATENT OFFICE,

CHARLES H. AMANNY AND LEWIS A. BARKER, OF coLUMBUs, onto."

IMPROVEMENT lN MACHINES FOR CUTTING BLANKS FOR PIPE-ELBOWS.

Specification forming part of Letters Patent No. 19-1 061}, dated August14, 1877; application filled May 1:, 1877.

To all whom't't may concern: 7

'Be it known that we, UHARLEs H. AMANN and LEwIs A. HARKER, of Columbus,in the county of Franklin and State of Ohio, haveinvented a new andvaluableImprovementin Machines for Cutting Sheet-MetalBlanks for Pipe-Elbows; and we do hereby declare that the following a full, clear, andexact description of the construction and operation of the same,reference being had to the annexed drawings, making a part of thisspecification, and to the letters and figures of reference markedthereon.

Figure 1 of the drawings is a representation of a top view of ourmachine. Fig. 2 is a front view thereof, and Fig. 3 is a verticaltransverse section of the same.

This invention has relation toimproveinenls in machines for cuttingsheet-metal blanks for curved pipe-elbows.

The object of our invention is to devise a machine that will cut out theblanks rapidly and economically, and at the same time out one of theedges thereof rounding, and in proper shape for forming curvedelbow-pipe.

The invention consists in an improved machine for cutting blanks forsections of curved pipe-elbows, consisting essentially of a bed, aremovable and'adjustable cutter supported in a rabbet at the edge ofsaid bed, and a vertically reciprocating bar, carrying a second cutter,both of the cutters having a central curved part and rectilinear ends.

It also consistsin the combination, with the bed and a stationary cuttersupported in a rabbet at its edge, of vertically-slotted side guides forthe vertically-reciprocating cutterhead, having horizontally-groovedarms, re'

ceiving the side edges of the bed, and adjustable thereon.

It also consists in the combination, with a bed having an edgecutter-blade, of spaced gage-pins of difl'erent heights and a side gagehigher than the highest of the said pins.

It furthermore consists in the combination, in a machine for cuttingblanks for sec tions of curved pipe-elbows, of the table or bed,carrying at its rear edge a curved cutter-blade, and provided with armssupporting a reciprocating cutter-blade, of the spaced gage-pinsincreasing in height from the cutter outward, and the side gage, all ashereinafter fully shown and described.

In the accompanying drawings, the letter A designates the feed-table ofmy improved machine for cutting pipe-elbow blanks, supported uponsuitable legs or standards B. These latter will be suitably bracedtogether, as shown at a, torender the table steady. The rear edge of thetable has a rectangular rabbet, I), closed at each end by a block orabutment, c, in which is seated the correspondinglyshaped portion ofacutter-head, G. This latter has upon its outer edge a central" convexrounded part, 01, terminating at each end in a rectilineartpart, (1',upon which is rigidly secured in any suitable manner acorrespondingly-shaped cutter-blade, D. This cutterhead is verticallyadjustable relative't-o the table by means of setscrews e, passing frombelow upward through the table, and bearing against the under side ofthe said head, this adjustment being assisted by the screws 0', thatsecure the head to the table, which pass through vertical slots 71,formed in the rear edge of the table, at the ends of the grooves f f,formed transversely in said table.

E represents side pieces, providedeach with a groove, 9, adapted toreceive the edge of the table, and secured thereto by means of a screw,g, that passes through a longitudinal slot, h, in said side pieces.These arms or side pieces are thus adjustable from front to rear of thetable. They are provided with vertical arms F at their rear ends, ineach of which a guide-groove, j, is formed, in which is mounted, aftervthe manner of a sash, a me-' tallic bar I). This bar is rabbeted, asshown at Ia, to receive the metallic head G, as above described, for thehead 0, and in this rabbet the head G is securedby means of thescrews 1. The middle part of this head is concave, as shown at m, andits ends rectilinear, or nearly so, and on this surface is rigidlysecured the cutting-blade G, of corresponding form.

The bar b is connected by means of rods 12 with a treadle, H, arrangedunder the table, and pivoted in any suitable manner to the standards.When this treadle is operated downward the cutting-blade G will bebrought down with its cutting-edge close to that of blade D, and a pieceofishe'et 'm'etal interposed between the two will be out exactly of theform of the lower blade upon one edge. The treadle is raised, therebyraising the cutter G, by means of a spring, I, secured at one end to thetreadle and at the other to the table. Thet top of the table is providedwith a transverse guide, J, which is rendered adjustable by means ofslots n and screws n, and serves not only as a guide in delivering themetal to the blades,but, being adjustable, allows elbow-blanks of anydesired length to be cut.

In order that the blanks may be regulated as to width conveniently,anumber of flatheaded pins, 00 0 0 arranged at right angles to thelength of the table in pairs, are employed. The distance from thecutters to the first set of pins 0 will be the width of one size ofblanks; from the said cutters to the second set 0 the width of asecondand wider set, and so on. These pins decrease in height from the outerto theinn'er set 0 consequently there will be no occasion in gaging thewidth of 'theblank to remove any of the pins, as the metal to be cut maybe passed over any of the pins until thatset indicating the widthdesired is reached. They may be, therefore, permanently applied to thetable, and serve as constant guides in reproducing sections ofpipe-elbow of given widths.

-We are aware that gage-blocks of varying heights, threaded foradjustment upon screwrods arranged in front of shears, are not new.

Having described our invention, what we claim, and desire to secure byLetters Patent, is-

1. An improved machine for cutting blanks for sections of curvedpipe-elbows, consisting essentially of the bed A, the removable andadjustable cutter D, supported in a rabbet at the edge of said bed, andthe vertically-reciprocating bar b carrying the cutter G, said cuttersbeing of the form substantially as specified.

2. In a machine for cutting blanks for sections of curved pipe-elbows,the combination, with the bed A and its stationary cutter D, supportedin a rabbet at its edge, of the vertically-slotted side guides F, forthe verticallyreciprocating cutter-head, said guides havinghorizontally-grooved arms E, receiving the side edges of the bed, andadjustable thereon, substantially as specified.

3. In a machine for cutting blanks for curved pipe-sections, thecombination, with a bed having an edge cutter-blade, of the gagepins 0 00 0 of different heights, and a side gage, J, higher than the highest ofsaid gagepins, substantially'as specified.

4. A machine for cutting blanks for sections of curved pipe-elbows,having, in connection with a bed or table, A, carrying at its rear edgea curved cutter, D, and arms supporting a reciprocating cutter, G", thespaced gage-pins increasing in height from the cutter outward, and theside gage, substantially as pecified.

CHARLES H. AMANN. LEWIS A. HARK-ER.

Witnesses. v

J oHN M. TIBBETTS, J. 0. PATRICK.

